Trace elements and antioxidant enzymes in extremely low birthweight infants

Andrea Loui; Andrea Raab; Rolf F. Maier; Peter Brätter; Michael Obladen

doi:10.1016/j.jtemb.2009.11.004

Trace elements and antioxidant enzymes in extremely low birthweight infants

Andrea Loui^*, Andrea Raab, Rolf F. Maier, Peter Brätter, Michael Obladen

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

Oxygen radicals are believed to contribute to typical diseases of prematurity, such as bronchopulmonary dysplasia (BPD), intraventricular haemorrhage (IVH), retinopathy of prematurity (ROP) and necrotising enterocolitis (NEC). Our aim was to investigate whether these disorders are associated with disturbances in antioxidant enzyme activities and with low trace elements, which are co-factors of antioxidant enzymes. 209 infants with birthweight less than 1000. g were enrolled into a European multicentre randomised erythropoietin (rhEPO) trial; 155 developed one or more of the above mentioned diseases. We analysed Zn, Cu, Fe, Se in plasma and red blood cells (RBCs), superoxide dismutase (CuZn-SOD), glutathione peroxidase (GSH-Px), and catalase (CAT) in RBCs on the 3rd and 68th day of life. Zn, Fe, Se in plasma, and Se in RBCs decreased (p<0.01), and Zn in RBC (p<0.001), CuZn-SOD (p<0.01) and CAT increased (p<0.05), whereas GSH-Px remained unchanged. No differences were observed between the rhEPO and control groups. Antioxidant enzyme activities did not correlate with gestational age. In infants with BPD, IVH, ROP, or NEC, CuZn-SOD and CAT (p<0.05) were higher at day 68 than in infants without these diseases. CuZn-SOD and GSH-Px at 3 days and CuZn-SOD at 68 days correlated positively (p<0.05) with the duration of oxygen treatment. In conclusion, in ELBW infants, trace element concentrations decreased over the first 10 weeks of life. Lower trace element concentrations, did not affect the activities of CuZn-SOD, GSH-Px, and CAT. Typical diseases of prematurity were not associated with decreased antioxidant enzyme activities.

Original language	English
Pages (from-to)	111-118
Number of pages	8
Journal	Journal of Trace Elements in Medicine and Biology
Volume	24
Issue number	2
DOIs	https://doi.org/10.1016/j.jtemb.2009.11.004
Publication status	Published - 1 Apr 2010

Bibliographical note

This study was supported by Hoffmann-La Roche, Basel, Switzerland and by NUMICO Research, Friedrichsdorf, Germany. We thank the parents of the preterm infants who enabled the study. We are indebted to PD Dr. Werner Hopfenmüller, Institute of Statistics und Biometrics, Charité University Medicine Berlin, for statistical advice. We thank Boris Metze for assistance in data processing and Anne Carney for editorial assistance.

The authors thank the entire European rhEPO study group. The names of the participants are listed in the Appendix.

Keywords

Catalase
Glutathione peroxidase
Oxidative stress
Superoxide dismutase
Typical diseases of prematurity

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10.1016/j.jtemb.2009.11.004

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title = "Trace elements and antioxidant enzymes in extremely low birthweight infants",

abstract = "Oxygen radicals are believed to contribute to typical diseases of prematurity, such as bronchopulmonary dysplasia (BPD), intraventricular haemorrhage (IVH), retinopathy of prematurity (ROP) and necrotising enterocolitis (NEC). Our aim was to investigate whether these disorders are associated with disturbances in antioxidant enzyme activities and with low trace elements, which are co-factors of antioxidant enzymes. 209 infants with birthweight less than 1000. g were enrolled into a European multicentre randomised erythropoietin (rhEPO) trial; 155 developed one or more of the above mentioned diseases. We analysed Zn, Cu, Fe, Se in plasma and red blood cells (RBCs), superoxide dismutase (CuZn-SOD), glutathione peroxidase (GSH-Px), and catalase (CAT) in RBCs on the 3rd and 68th day of life. Zn, Fe, Se in plasma, and Se in RBCs decreased (p<0.01), and Zn in RBC (p<0.001), CuZn-SOD (p<0.01) and CAT increased (p<0.05), whereas GSH-Px remained unchanged. No differences were observed between the rhEPO and control groups. Antioxidant enzyme activities did not correlate with gestational age. In infants with BPD, IVH, ROP, or NEC, CuZn-SOD and CAT (p<0.05) were higher at day 68 than in infants without these diseases. CuZn-SOD and GSH-Px at 3 days and CuZn-SOD at 68 days correlated positively (p<0.05) with the duration of oxygen treatment. In conclusion, in ELBW infants, trace element concentrations decreased over the first 10 weeks of life. Lower trace element concentrations, did not affect the activities of CuZn-SOD, GSH-Px, and CAT. Typical diseases of prematurity were not associated with decreased antioxidant enzyme activities.",

keywords = "Catalase, Glutathione peroxidase, Oxidative stress, Superoxide dismutase, Typical diseases of prematurity",

author = "Andrea Loui and Andrea Raab and Maier, {Rolf F.} and Peter Br{\"a}tter and Michael Obladen",

note = "This study was supported by Hoffmann-La Roche, Basel, Switzerland and by NUMICO Research, Friedrichsdorf, Germany. We thank the parents of the preterm infants who enabled the study. We are indebted to PD Dr. Werner Hopfenm{\"u}ller, Institute of Statistics und Biometrics, Charit{\'e} University Medicine Berlin, for statistical advice. We thank Boris Metze for assistance in data processing and Anne Carney for editorial assistance. The authors thank the entire European rhEPO study group. The names of the participants are listed in the Appendix.",

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doi = "10.1016/j.jtemb.2009.11.004",

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AU - Loui, Andrea

AU - Raab, Andrea

AU - Maier, Rolf F.

AU - Brätter, Peter

AU - Obladen, Michael

N1 - This study was supported by Hoffmann-La Roche, Basel, Switzerland and by NUMICO Research, Friedrichsdorf, Germany. We thank the parents of the preterm infants who enabled the study. We are indebted to PD Dr. Werner Hopfenmüller, Institute of Statistics und Biometrics, Charité University Medicine Berlin, for statistical advice. We thank Boris Metze for assistance in data processing and Anne Carney for editorial assistance. The authors thank the entire European rhEPO study group. The names of the participants are listed in the Appendix.

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N2 - Oxygen radicals are believed to contribute to typical diseases of prematurity, such as bronchopulmonary dysplasia (BPD), intraventricular haemorrhage (IVH), retinopathy of prematurity (ROP) and necrotising enterocolitis (NEC). Our aim was to investigate whether these disorders are associated with disturbances in antioxidant enzyme activities and with low trace elements, which are co-factors of antioxidant enzymes. 209 infants with birthweight less than 1000. g were enrolled into a European multicentre randomised erythropoietin (rhEPO) trial; 155 developed one or more of the above mentioned diseases. We analysed Zn, Cu, Fe, Se in plasma and red blood cells (RBCs), superoxide dismutase (CuZn-SOD), glutathione peroxidase (GSH-Px), and catalase (CAT) in RBCs on the 3rd and 68th day of life. Zn, Fe, Se in plasma, and Se in RBCs decreased (p<0.01), and Zn in RBC (p<0.001), CuZn-SOD (p<0.01) and CAT increased (p<0.05), whereas GSH-Px remained unchanged. No differences were observed between the rhEPO and control groups. Antioxidant enzyme activities did not correlate with gestational age. In infants with BPD, IVH, ROP, or NEC, CuZn-SOD and CAT (p<0.05) were higher at day 68 than in infants without these diseases. CuZn-SOD and GSH-Px at 3 days and CuZn-SOD at 68 days correlated positively (p<0.05) with the duration of oxygen treatment. In conclusion, in ELBW infants, trace element concentrations decreased over the first 10 weeks of life. Lower trace element concentrations, did not affect the activities of CuZn-SOD, GSH-Px, and CAT. Typical diseases of prematurity were not associated with decreased antioxidant enzyme activities.

AB - Oxygen radicals are believed to contribute to typical diseases of prematurity, such as bronchopulmonary dysplasia (BPD), intraventricular haemorrhage (IVH), retinopathy of prematurity (ROP) and necrotising enterocolitis (NEC). Our aim was to investigate whether these disorders are associated with disturbances in antioxidant enzyme activities and with low trace elements, which are co-factors of antioxidant enzymes. 209 infants with birthweight less than 1000. g were enrolled into a European multicentre randomised erythropoietin (rhEPO) trial; 155 developed one or more of the above mentioned diseases. We analysed Zn, Cu, Fe, Se in plasma and red blood cells (RBCs), superoxide dismutase (CuZn-SOD), glutathione peroxidase (GSH-Px), and catalase (CAT) in RBCs on the 3rd and 68th day of life. Zn, Fe, Se in plasma, and Se in RBCs decreased (p<0.01), and Zn in RBC (p<0.001), CuZn-SOD (p<0.01) and CAT increased (p<0.05), whereas GSH-Px remained unchanged. No differences were observed between the rhEPO and control groups. Antioxidant enzyme activities did not correlate with gestational age. In infants with BPD, IVH, ROP, or NEC, CuZn-SOD and CAT (p<0.05) were higher at day 68 than in infants without these diseases. CuZn-SOD and GSH-Px at 3 days and CuZn-SOD at 68 days correlated positively (p<0.05) with the duration of oxygen treatment. In conclusion, in ELBW infants, trace element concentrations decreased over the first 10 weeks of life. Lower trace element concentrations, did not affect the activities of CuZn-SOD, GSH-Px, and CAT. Typical diseases of prematurity were not associated with decreased antioxidant enzyme activities.

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KW - Glutathione peroxidase

KW - Oxidative stress

KW - Superoxide dismutase

KW - Typical diseases of prematurity

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ER -

Trace elements and antioxidant enzymes in extremely low birthweight infants

Abstract

Bibliographical note

Keywords

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